I agree with Ross. The piece is almost certainly Czech in origin. I don't recognise the design, but I'd suggest Halama. I wouldn't rule out Schlevogt or Hoffmann either. As Ross mentioned, models from these makers have remained in production for decades and more recently have been sold under the Desna brand. You might try looking through the Desna website to see if you can find it.
By the way, don't worry about it not being Lalique. Czech glass is every bit as good, it just lacks the snob value!